Beginning March 22, 2019, three major bridges in Somerville, MA will be closed to facilitate construction of the MBTA Green Line Extension (GLX) project. Traffic detours will affect local and regional commutes through Medford, Somerville, Cambridge, and Boston. Motorists, pedestrians, and bicyclists should plan accordingly and may want to seek alternate routes.

The closures of the Broadway and Medford Street Bridges are necessary in order to accommodate the construction of new Green Line light-rail tracks. Currently, these bridges are only wide enough to accommodate the existing commuter rail service that operates beneath them. The Washington St. Bridge requires a complete reconstruction of abutments and structural span in order to accommodate the addition of new light-rail transit service and the Community Path.